With AE, the recon mouseovers seen by the Allies show the air units as of the previous turn. However, if the Japanese transfer all of the air units out of a base, the little airfield symbol disappears, even though the mouseover shows planes present.

The same works in reverse - the airfield icon pops up to show that there are planes present even though the recon mouseover doesn't show them yet.

Not a huge issue, but if it's easy it would be preferable for the display of the aircraft icon to be based on the prior turn's status, just as the mouseover appears to be.